Send right back a while after (5)
I believe the answer is:
Here is my best explanation:
'send' is the definition.
'right back a while after' is the wordplay.
'right' becomes 'r' (common abbreviation).
'back' says the letters should be written in reverse.
'a while' becomes 'time' (I've seen this before).
'after' means one lot of letters go next to another.
'time' in reverse letter order is 'emit'.
(Other definitions for remit that I've seen before include "Pardon or transmit money", "Dispatch", "Brief - transfer", "Area of responsibility", "Cancel - terms of reference", "Area of authority", "Send (money) in payment; pardon", "Job specification", "forward" and "Relax; send (payment)".)